* Added default Employees for each type of AccessCode (Manager, Sales, etc)
* Used the employee emails which Chris created
* Added pseudo unit testing steps in InitialSetup's SetupEmployees logic.
* Added example code to SetupCustomers for how we could initialize and test any pre-made Customers
* Added a new method to Admin, UserNameAlreadyTaken, for testing to see if a user by the given UserName already exists in the DB. Needed for multiple validation steps
* Corrected how we convert AccessCode values to/from the DB in DatabaseManagerEmployees.cs
* Fully implemented the LogIn UI, and removed the related code hacks we had before
* Started planning the EnterEditEmployeeForm data binding (should be finished later tonight)